Alert archive / South Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 717

May 24, 2016Cherry County, Sheridan County, Nebraska; 12 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 24, 2016, 8:02 PM MDT for Cherry County, Sheridan County, Nebraska; 12 counties in South Dakota. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: May 24, 2016, 8:02 PM MDT (02:02 UTC)
Expired: May 24, 2016, 9:00 PM MDT
In force: 58 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Cherry County, NE, Sheridan County, NE, Bennett County, SD, Haakon County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 154 km from the middle of the area, began a volume at 02:05 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 2.0 hours before the alert went out and 179 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 5 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 2058 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 6:09 PM MDT	Tornado Watch	SPC	Chase, Deuel, Dundy, Hayes, Hitchcock, Keith and 3 more	6 hr
May 24, 8:49 PM MDT	Mesoscale Discussion	SPC	Gage, Jefferson, Nuckolls, Pawnee, Richardson, Thayer	86 min
May 24, 9:09 PM MDT	Severe Thunderstorm Watch	SPC	Gage, Johnson, Nemaha, Pawnee, Richardson	6 hr
May 24, 9:43 PM MDT	Mesoscale Discussion	SPC	Adams, Buffalo, Custer, Dawson, Franklin, Frontier and 15 more	92 min
May 24, 10:07 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Blaine, Buffalo, Custer, Dawson, Franklin and 17 more	6 hr
May 24, 10:56 PM MDT	Mesoscale Discussion	SPC	Chase, Dundy, Hayes, Hitchcock, Lincoln	64 min
May 25, 2:33 AM MDT	Mesoscale Discussion	SPC	Adams, Buffalo, Chase, Dawson, Franklin, Frontier and 8 more	57 min
May 25, 1:52 PM MDT	Mesoscale Discussion	SPC	Arthur, Blaine, Boyd, Brown, Chase, Cherry and 16 more	53 min
May 25, 5:10 PM MDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brown, Brule, Buffalo, Campbell and 16 more	65 min

Nearby

Mesoscale Discussions in South Dakota, 2016 Mesoscale Discussions in Nebraska, 2016 Every mesoscale discussion in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.